The Chelsea Pump Flange, part number 21P661 (also referenced as 21-P-661), is a genuine Chelsea component designed for use with PTO assemblies in the Power Take Off driveline system. This flange connects the pump to the PTO output, making it a direct-replacement service part for Chelsea PTO configurations. It is sold individually as a single unit. Pro Gear and Transmission carries genuine Chelsea PTO parts, and our team is available to help confirm proper fitment for your specific PTO setup. Call us if you need help identifying the right flange for your application.FeaturesGenuine Chelsea pump flange for PTO assembliesOEM part number 21-P-661, also listed as 21P661Direct-replacement service part for Chelsea PTO driveline configurationsSold as a single unitCall Pro Gear and Transmission to confirm compatibility with your PTO setupUsed in these Chelsea PTO models221 Series267 Series442 Series447 Series489 Series